1016891 has 2 divisors, whose sum is σ = 1016892. Its totient is φ = 1016890.

The previous prime is 1016881. The next prime is 1016909. The reversal of 1016891 is 1986101.

1016891 is nontrivially palindromic in base 8.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1016891 - 2¹⁴ = 1000507 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1016891.

It is not a weakly prime, because it can be changed into another prime (1016881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508445 + 508446.

It is an arithmetic number, because the mean of its divisors is an integer number (508446).

2^1016891 is an apocalyptic number.

1016891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1016891 is an equidigital number, since it uses as much as digits as its factorization.

1016891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1016891 is about 1008.4101348162. The cubic root of 1016891 is about 100.5598926846.

The spelling of 1016891 in words is "one million, sixteen thousand, eight hundred ninety-one".